Water-purifier.



No. 729.236; PATEN'I'ED' MAY 26, 1903 G. M. DAVIDSON.

WATER PURIPIER.

APPLICATION FILED JAN. 31. 1903. no MODEL. a SHEETS-SHEET a w rws -tTtns co. mmauwo" WASNmGYoM. u. 1.,

PATENTED MAY 26 1903.

G. M. DAVIDSON.

WATER PURIFIER. Arrmon xor 2mm JAR. 31, 1903.

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aeor ye PATENT Patented May 26, 1903.

OFFICE.

"GEORGE M. DAVIDSON, or CHICAGO, ILLINOIS.

WATER-PURIFIER.

SPECIFICATION formingpart of Letters Patent N 0. 729,286, dated May 26, 1903.

' Application filed January 31, 19Q3t- Serial No. 141,295. (No model.)

To alt whom it may concern.-

Be it known that I, GEORGE M. DAVIDSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Water-Purifiers, of which the following is a specification.

This invention relates to that class of mech Y anisms known as water-purifiers-that is,

apparatus or mechanism arranged to mix predetermined quantities or proportions of chemicals with feed-water preliminary to the feeding of the same into a steam-boiler, so as to minimize as much as possible the deleterious action of ordinary waterson the boiler-shell during the generation ofsteam--all of which will more fully hereinafter appear.

The principal object of the invention is to provide a simple, economical, and efficient water-purifier.

Other and further objects of the invention will appear from an examination of the drawings and thefollowing description and claims.

The invention consists principally in the combination of a chemical-feed tank, stirring mechanism movably mounted therein, pump mechanism secured to and connected with the feed-tank inside the mixing-chamber, a

water-supply pipe arranged to receive the chemical-supply as it passes from the pumping mechanism in the chemical-feed tank,and; a tilting vessel arranged to receive the discharge of the mixed chemical and water supply and connected with the pumping mechmovements.

The invention consists, further and finally,

in the features, combinations, and details direction of the arrow; Fig. 3, a front eleva-' tion of a complete mechanism constructed in accordance with these improvements; Fig. 4, an enlarged vertical sectional elevation of the liquid-IeVeI indicating mechanism, showing it attached to the inner side of the chemical-feed tank, taken on line 4 of Fig. 1 lookingin the direction of the arrow; and Fig. 5, a sectional elevation of the pumping mechanism, showing it attached to the inner side of the mixing-chamber of the chemical-feed tank, taken on line 5 of Fig. 1 looking in the direction of the arrow.

In the art to which this invention relates it is well known that all natural boiler-feed Waters contain more or less incrusting solid or the efficiency of the boiler, as well as resulting in extra consumption of fuel and decrease in the life of the boiler. It is also well known that a great many chemicals may be used and mixed with the feed-water before it enters the boiler to precipitate and remove said solids or other'deleterious substances, so that the water when used will not have the 0bject-ionable actions above noted on the boiler.

The principal object, therefore, of this invention is to provide a suitable mixing apparatus, one which measures the chemicals and water in predetermined quantities and theroughly mixes them before they enter a settling tank or tanks preliminary to: being fed into the boiler, and means in the settlingtanks for thoroughly agitating thepurified water and sediment therein, so-as to obtain the best results, allof which will. more fully hereinafter appear. anism to operate the same by and during its In constructing-and arranging an apparatus in accordance with these improvements I provide a preliminary chemical-mixing tank a of the desired size and shape, preferably cylindrical in contour, and place it in a vertical position, as shown particularly in Fig.

2 of the drawings. This 'preliminarychemical-mixing tank is, as above suggested, provided for the purpose of preliminarily mixing the chemicals with the desired quantity of Water in order to primarily dissolve and mix them and is provided with a screen I), which acts as a strainer to separate the liquid from the coarse solid elements, so that the mixed chemicals and water may be drawn 0% through a pipe 0, which I will hereinafter term the chemical-supply pipe. In order to thoroughly mix this chemical solution after it has been primarily dissolved or mixed with the requisite amount of water, a chemical mixing and feed tank d is provided, which is made, preferably, oval in shape, vertically arranged, and open at the top,-into which the'chemicalsupplypipecdischarges. This chemical-supply pipe, as shown in the drawings, is provided with a plug-valve e, which may be opened and closed whenever desired or necessary-that is, whenever it is desirable to supply the chemical mixing and feed tank with a fresh supply of chemicals the plug-valve is opened and whenever it is necessary to shut off such supply the plug-valve is closed, all of which will be understood and appreciated by those conversant with the art.

To thoroughly mix and keep the chemical solution stirred and in condition for use in the chemical-feed tank above described, stirrers or beatersf are provided, mounted upon a vertical shaft g, in turn rotatably mounted in the axial center of such feed-tank. The lower part of this rotatable stirrershaft has a stepped hearing it in the lower or bottom part of the chemical-feed tank, and the upper part is rotatably mounted in a bracket 1', in turn mounted upon cross-bars 10 on the upper part of the tank. The lower part is separated from the upper part by means of a wire mesh or screen j, which serves to strain the liquid and keep the coarse solids above the same and also, as hereinafter set forth, to permit nothing but liquid or the finest solids from passing out of the tank.

In order to measure and feed the chemical solution so that it may be mixed with the requisite quantity of water-supply,the chemical-feed tank is provided with two pumps 70, arranged inside thereof, so as to have their open lower ends at all times below the water-level and in the mixing-chamber of such tanks. These pumps,as will beseen from an examination of the drawings, are vertically arranged and are formed in two tubular sections-a lower smaller section and an upper relatively larger section. The lower tubular sections are, as above suggested, open at their lower ends and in the chemical-feed tank below the liquid-level, and in order to facilitate the cleaning of the pumps a ballvalve is formed by a removable cage Z, having a tapered engagement with the tube of the pump and provided with a ball-valve m. By this arrangement it willbe seen that when the suction mechanism,hereinafterdescribed, is removed the operator may take a hook and pass it beneath the loop m of the cage and remove the same upward and out of the tubular section for purposes of repair or renewal. By making a pump in two tubular sections with the larger diameter at the top the suction or plunger mechanism 0, which is made in the shape of a cage with a ballvalve 1) therein, may be fitted to the lower and relatively smaller section, so as to reciprocate therein, and when necessary may be drawn upward therefrom. As it does not fitthe upper tubular section, it will also be seen that it may be drawn easily and readily out through the same for purposes of renewal or repair. Itis further clear that no incrustation of chemicals is likely to take place within the pump, for the reason that the pump being at all times arranged Within theliquidchamber of the chemical-feed tank the sediment will either become dissolved or fall backwardly and downwardly into the bottom of the tank, thus preventing any clogging of the um ing mechanism. The um s are m vided with discharge-spouts g at or near their upper portions which lead to and discharge into an open duct or ducts 7', having a single discharge-spout .9, arranged above a watersupply pipe 11. This Water-supply pipe is provided with a funnel 9, arranged, as shown particularly in Figs 1 and 2, directly underneath the single discharge-spout of the open channels or duct, so that before the water passes out of such water-supply pipe the chemicals are fed therein for the purpose of being thoroughly mixed with the water and in the requisite quantities. By this arrangement the open duct or channel minimizes the danger of clogging which is apt to take place in a closed pipe or tube from the incrustation of the solids therein, and if any incrustation should take place it can be readily removed by the operator as desirable or necessary. It is desirable that these quantities of chemicals and water be measured with some care and mixed in the required proportions in order to obtain the desired results, and also that it be done as economically as possible. To accomplish this result, a tilting measuring vessel 10 is provided and mounted upon a pivot 12, in turn rotatably supported on pillow-blocks w directly under the discharge of the mixed water and chemicals as they leave the water-supply pipe, so that it may be tilted from side to side. This tilting and measuring vessel is provided with two measuring-chambers of and n so that when it is in the position shown in Fig. 3 the mixed water and chemicals may flow into the chamber it until it is nearly filled. When such chamber is nearly filled, it counterbalances the weight of the other end of the tilting vessel, depresses it, and at the same time raises the other, so that the water may flow out and over the edge thereof and into the desired conduit or vessel for purposes of storage or otherwise. While the chamber u is emptying the chamber 11, is being filled, and when the latter is filled it in turn is depressed, returning the opposite end of the tilting vessel to the position shown in Fig. 3. These chambers are of a predetermined size, which is best reached by determining the quantities of water and chemicals that should be mixed, and during their tilting operations operate, by means of the mechanisms hereinafter described, the pumping and stirring mechanism, thereby feeding the desired amount of chemicals into the water-supply and during the operations of the vessel only. In order to operate the pumps during the tilting operations of the measuring vessel, the rods of the pump-plungers are connected to a walking-beam y, which has its sleeve portion vibratingly mounted on a shaft .2. The ends of this walking-beam are connected, by means of chains 11 and 12, with clevises 13 and 14, respectively, on 'each end of the tilting vessel. An examination of Fig. 3 of the drawings will show that when the parts are in the position shown therein and as the vessel is being tilted downwardly and to the left the pump 7; at the right of such figure is operated, or the plunger thereof, so as to furnish a predetermined quantity of mixed chemical to the water-supply pipe. It will be understood that the Water-supply is constantly running and that the pump is intermittently acted and only during the tilting operations ofthe tilting vessel. From this description of construction and operation it will be seen that a certain predetermined quantity of chemicals is fed to each side of the measuring vessel in proportion to the amount of other liquid which it will take to fill the same. In other words, the water-supply is constant and the tilting operations and chemical supply intermittent.

It is desirable to provide means for automatically rotating the beater-shaft g. To accomplish this, the horizontal shaft .2, above set forth, is provided with a bevel-gear 15, meshing with a bevel-pinion 16 on the upper end of the beater-shaft. The outer end of the horizontal shaft is provided with a sprocketwheel 17, around which a chain 18 passes, the ends of such chain being connected to the clevises 13 and 14, respectively, by means of pieces of ordinary chain 1!) and 20. By this construction and arrangement it will be seen that as the tilting vessel is operated it causes the beater shaft to rotate and the heaters thereon to operate and thoroughly agitate and assist in dissolving and mixing the chemicals in the chemical-feed tank. It is also desirable to have some means by which the level of the liquids in the chemical-feed tank may be easily determined. For this purpose a stand-pipe 21 is arranged within the chemical-feed tank (see Fig. 4) and open at its upper and lower ends. In this stand-pipe is arranged an empty bottle or similar vessel 22, provided with a rod 22-, extending upwardly therefrom and out through the upper end of the tank. This rod may have a cord or cable 23 attached thereto and passed over idlers 24 and 25 and down into any desired position,'so as to operate any desired indicator, and thus inform the operator as to the level of the liquid in the tank without any necessity of the operator inspecting the interior to ascertain what liquid may be therein.

Buifer-sprin gs 26 are provided and arranged underneath each end of the tilting vessel, so as to lessenor absorb the shocks or jars incident to the stopping of the tilting vessel as it approaches each limit of its motion.

I claim- 1. In a water-purifier of the class described, the combination of an elongated chemicalfeed tank, stirring mechanism mounted therein, a plurality of pump mechanisms secured to the walls of such feed-tank and inside the mixing-chamber, a water-supply pipe, open ducts or channels leading from the pumping mechanism in the chemical-supply tank so as to discharge the chemical-supply into the water-supply tank, and a tilting vessel arranged to receive the discharge of the mixed chemical and water supply and connected with the pumping mechanism so as to operate the same, substantially as described.

2. In a water-purifier of the class described, the combination of an oval chemical-feed tank, stirring mechanism mounted in such chemical-feed tank, two pumps vertically arranged inside of such chemical-feed tank socured to the walls thereof and open at their bottom portions, a water-supply pipe, an open channel or duct leading from both of the pumps to the water-supply pipe so as to discharge the chemical-supply therein, and a tilting vessel arranged to receive the discharge of the mixed chemical and'water supply and connected with the pumping mechanism so as to operate the same, substantially as described.

GEORGE M. DAVIDSON.

Witnesses:

HARRY I. CROMER, ANNIE O. COURTENAY. 

